Tables > Conduit and Tubing > Conductors > Max conductors in flexible metallic conduit

	Type Letters Cond. Size AWG/kcmil Trade Sizes In Inches .50 .75 1 1.25 1.50 2 2.50 3 3.50 4 RH 14 6 10 15 24 35 62 94 135 184 240   12 5 8 12 19 28 50 75 108 148 193 RHH, RHW, RHW-2 14 4 7 11 17 25 44 67 96 131 171   12 3 6 9 14 21 37 55 80 109 142 RH, RHH, RHW, RHW-2 10 3 5 7 11 17 30 45 64 88 115   8 1 2 4 6 9 15 23 34 46 60   6 1 1 3 5 7 12 19 27 37 48   4 1 1 2 4 5 10 14 21 29 37   3 1 1 1 3 4 8 13 18 25 33   2 1 1 1 3 2 7 11 16 22 28   1 0 1 1 1 2 5 7 10 14 19   1/0 0 1 1 1 1 4 6 9 12 16   2/0 0 1 1 1 1 3 5 8 11 14   3/0 0 0 1 1 1 3 5 7 9 12   4/0 0 0 1 1 1 2 4 6 8 10   250 0 0 0 1 1 1 3 4 6 8   300 0 0 0 1 1 1 2 4 5 7   350 0 0 0 1 1 1 2 3 5 6   400 0 0 0 0 1 1 1 3 4 6   500 0 0 0 0 1 1 1 3 4 5   600 0 0 0 0 1 1 1 2 3 4   700 0 0 0 0 0 1 1 1 3 3   750 0 0 0 0 0 1 1 1 2 3 TW 14 9 15 23 36 53 94 141 203 277 361   12 7 11 18 28 41 72 108 156 212 277   10 5 8 13 21 30 54 81 116 158 207   8 3 5 7 11 17 30 45 64 88 115 RHH*, RHW*, RHW-2*, THHW, THW, THW-2 14 6 10 15 24 35 62 94 135 184 240 RHH*, RHW*, RHW-2*, THHW, THW 12 5 8 12 19 28 50 75 108 148 193   10 4 6 10 15 22 39 59 85 115 151 RHH*, RHW*, RHW-2*, THHW, THW, THW-2 8 1 4 6 9 13 23 35 51 69 90 RHH*, RHW*, RHW-2*, TW, THW, THHW, THW-2 6 1 3 4 7 10 18 27 39 53 69   4 1 1 3 5 7 13 20 29 39 51   3 1 1 3 4 6 11 17 25 34 44   2 1 1 2 4 5 10 14 21 29 37   1 1 1 1 2 4 7 10 15 20 26   1/0 0 1 1 1 3 6 9 12 17 22   2/0 0 1 1 1 3 5 7 10 14 19   3/0 0 1 1 1 2 4 6 9 12 16   4/0 0 0 1 1 1 3 5 7 10 13   250 0 0 1 1 1 3 4 6 8 11   300 0 0 1 1 1 2 3 5 7 9   350 0 0 0 1 1 1 3 4 6 8   400 0 0 0 1 1 1 3 4 6 7   500 0 0 0 1 1 1 2 3 5 6   600 0 0 0 0 1 1 1 3 4 5   700 0 0 0 0 1 1 1 2 3 4   750 0 0 0 0 1 1 1 2 3 4 THHN, THWN, THWN-2 14 13 22 33 52 76 134 202 291 396 518   12 9 16 24 38 56 98 147 212 289 378   10 6 10 15 24 35 62 93 134 182 238   8 3 6 9 14 20 35 53 77 105 137   6 2 4 6 10 14 25 38 55 76 99   4 1 2 4 6 9 16 24 34 46 61   3 1 1 3 5 7 13 20 29 39 51   2 1 1 3 4 6 11 17 24 33 43   1 1 1 1 3 4 8 12 18 24 32   1/0 1 1 1 2 4 7 10 15 20 27   2/0 0 1 1 1 3 6 9 12 17 22   3/0 0 1 1 1 2 5 7 10 14 18   4/0 0 1 1 1 1 4 6 8 12 15   250 0 0 1 1 1 3 5 7 9 12   300 0 0 1 1 1 3 4 6 8 11   350 0 0 1 1 1 2 3 5 7 9   400 0 0 0 1 1 1 3 5 6 8   500 0 0 0 1 1 1 2 4 5 7   600 0 0 0 0 1 1 1 3 4 5   700 0 0 0 0 1 1 1 3 4 5   750 0 0 0 0 1 1 1 2 3 4 FEP, FEPB, PFA, PFAH, TFE 14 12 21 32 51 74 130 196 282 385 502   12 9 15 24 37 54 95 143 206 281 367   10 6 11 17 26 39 68 103 148 201 263   8 4 6 10 15 22 39 59 85 115 151   6 2 4 7 11 16 28 42 60 82 107   4 1 3 5 7 11 19 29 42 57 75   3 1 2 4 6 9 16 24 35 48 62   2 1 1 3 5 7 13 20 29 39 51 PFA, PFAH, TFE 1 1 1 2 3 5 9 14 20 27 36 PFA, PFAH, TFE, Z 1/0 1 1 1 3 4 8 11 17 23 30   2/0 1 1 1 2 3 6 9 14 19 24   3/0 0 1 1 1 3 5 8 11 15 20   4/0 0 1 1 1 2 4 6 9 13 16 Z 14 15 25 39 61 89 157 236 340 463 605   12 11 18 28 43 63 111 168 241 329 429   10 6 11 17 26 39 68 103 148 201 263   8 4 7 11 17 24 43 65 93 127 166   6 3 5 7 12 17 30 45 65 89 117   4 1 3 5 8 12 21 31 45 61 80   3 1 2 4 6 8 15 23 33 45 58   2 1 1 3 5 7 12 19 27 37 49   1 1 1 2 4 6 10 15 22 30 39 XHH, XHHW, XHHW-2, ZW 14 9 15 23 36 53 94 141 203 277 361   12 7 11 18 28 41 72 108 156 212 277   10 5 8 13 21 30 54 81 116 158 207   8 3 5 7 11 17 30 45 64 88 115   6 1 3 5 8 12 22 33 48 65 85   4 1 2 4 6 9 16 24 34 47 61   3 1 1 3 5 7 13 20 29 40 52   2 1 1 3 4 6 11 17 24 33 44 XHH, XHHW, XHHW-2 1 1 1 1 3 5 8 13 18 25 32   1/0 1 1 1 2 4 7 10 15 21 27   2/0 0 1 1 2 3 6 9 13 17 23   3/0 0 1 1 1 3 5 7 10 14 19   4/0 0 1 1 1 2 4 6 9 12 15   250 0 0 1 1 1 3 5 7 10 13   300 0 0 1 1 1 3 4 6 8 11   350 0 0 1 1 1 2 4 5 7 9   400 0 0 0 1 1 1 3 5 6 8   500 0 0 0 1 1 1 3 4 5 7   600 0 0 0 0 1 1 1 3 4 5   700 0 0 0 0 1 1 1 3 4 5   750 0 0 0 0 1 1 1 2 3 4
* Types RHH, RHW, and RHW-2 without outer covering Reprinted with permission from NFPA 70-1999, the National Electrical Code®, Copyright 1998, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the referenced subject which is represented only by the Standard in its entirety.
See also Guides Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Parallel Conductor sizing and ampacities for insulated conductors rated 0-2000 Volts in raceway, cable, or direct buried Tables Maximum number of conductors in liquid-tight flexible metallic conduit Maximum number of conductors in rigid metallic conduit Definitions Offset Bend Back-to-back Bend